Hi,
How can I set AutoSum property on sorting field into Query with x++

I do this into Query Init method but without success.
X++:
this.query().dataSourceTable(tablenum(LedgerTrans)).sortClear();
this.query().dataSourceTable(tablenum(LedgerTrans)).addSortField(fieldnum(LedgerTrans, Voucher), SortOrder::Ascending);
this.query().dataSourceTable(tablenum(LedgerTrans)).addSortField(fieldnum(LedgerTrans, TransDate), SortOrder::Ascending);
this.query().dataSourceTable(tablenum(LedgerTrans)).addSortField(fieldnum(LedgerTrans, AccountNum), SortOrder::Ascending);
this.query().dataSourceTable(tablenum(LedgerTrans)).autoSum(fieldNum(LedgerTrans, Voucher));
thank's in advance